Re: what practitioner treats with manipulation only

Chiropractic physicians use manipulation for management of problems. I 
am not terribly well informed on this matter. Perhaps they gave this 
question to a medical doctor because there are not any Mad Scientist 
Doctors of Chiropractic. You may want to consult other 
sources as well. 

Although chiropractitioners used to restrict themselves to 
manipulation, there is a group of practitioners known informally as 
"mixers" who use nutritional theories and may do blood testing for 
diagnosis. Historically there has been quite a bit of rivalry and 
suspicion between medical practitioners and chiropracters.
This is the American Chiropractic site: http://www.amerchiro.org/

Osteopathic physicians have a training that is quite similar to medical 
doctors. At one time their practice included quite a bit of manipulative 
techniques, but my understanding is that the amount of manipulative 
treatements by osteopathic physicians has decreased in recent decades. 

David Winsemius, MD